JIT: genericize immediate address handling, support in float stores too
JIT: fix register preloading

Partially broken by typoes in the bitset patch.
Merge pull request #1492 from FioraAeterna/fixregpreload

JIT: fix register preloading
Merge pull request #1230 from FioraAeterna/constaddr

JIT: improve handling of stores with a known address
PowerPC: Remove unused variable.
Merge pull request #1498 from rohit-n/unused

PowerPC: Remove unused variable.
TASInputDlg: Narrow a variable scope in UpdateFromText
Merge pull request #1499 from lioncash/scope

TASInputDlg: Narrow a variable scope in UpdateFromText